ナスィール・ウッ・ディーン・トゥースィーの生涯と業績

抄録

It is noteworthy that the verdict given by Orientalists on the medieval Persian erudite scholar Nasir al-Din Tusi has changed in the course of time, especially after the Second World War. Before the War, he used to be condemned for his treachery to his master and the part played by him in the fall of Baghdad. But, on the contrary, after the War he is sometimes regarded as a benefactor to the renaissance of Islamic culture.
So in this article the writer intends to re-examine his life at a crucial time through the following periods:
(1)-His connection with the Ismailites.
(2)-The role played by him in the fall of Baghdad.
(3)-His academic activities in Maragheh.
In conclusion his value should be estimated, not from the viewpoint of his political career, but from the standpoint of his great contributions to the re-birth of Islamic civilization after its destruction by Mongols.